Access chamber and markers for biopsy device

摘要

A marker deployment tool may comprise a marker cannula having a lateral deployment aperture, a push rod slidably disposed within the marker cannula and a scalloped tip coupled to the distal end of the marker cannula. The scalloped tip may have a push rod recess configured to receive a portion of the distal end of the push rod such that the push rod does not appreciably extend out of the lateral deployment aperture when the push rod is actuated distally. The marker deployment tool may further comprise a magnet at or near the distal end. This magnet may be used in combination with a magnet or plurality of magnets disposed about an access chamber in a tissue sample holder to assist the user in aligning the marker deployment tool. The access chamber in the tissue sample holder may also include a valve, two valves, or a removable plug.

主权项

1. A marker delivery device comprising:
(a) a tube having a distal end and a lateral marker deployment aperture; (b) at least one biopsy marker disposed proximally of the lateral marker deployment aperture within the tube; (c) a member having a distal end and disposed at least partially within the tube, the member movable in a distal direction to deploy the at least one biopsy marker from the tube through the lateral marker deployment aperture; and (d) a distal tip positioned at the distal end of the tube, wherein the distal tip comprises a ramp having a ramp surface, and wherein the distal tip comprises a laterally opening recess, wherein the recess has an opening disposed in a portion of the ramp surface, wherein the recess is sized and shaped for receiving a portion of the distal end of the member; and wherein the distal tip further comprises a marker engaging element extending proximally from the ramp surface, wherein the marker engaging element comprises a tapered proximal end having a first incident angle.